<!DOCTYPE HTML>
<html lang="zh-CN">


<head>
    <!-- hexo-inject:begin --><!-- hexo-inject:end --><meta charset="utf-8">
    <meta name="keywords" content="javaScript-数组常见的一些方法, HTML,CSS,JavaScript,JQuery,React,Vue.js等">
    <meta name="description" content="别做一个Vue api调用师">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
    <meta name="renderer" content="webkit|ie-stand|ie-comp">
    <meta name="mobile-web-app-capable" content="yes">
    <meta name="format-detection" content="telephone=no">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
    <!-- Global site tag (gtag.js) - Google Analytics -->


    <title>javaScript-数组常见的一些方法 | zihao blog</title>
    <link rel="icon" type="image/png" href="/pride-blog/favicon.png">

    <link rel="stylesheet" type="text/css" href="/pride-blog/libs/awesome/css/all.css">
    <link rel="stylesheet" type="text/css" href="/pride-blog/libs/materialize/materialize.min.css">
    <link rel="stylesheet" type="text/css" href="/pride-blog/libs/aos/aos.css">
    <link rel="stylesheet" type="text/css" href="/pride-blog/libs/animate/animate.min.css">
    <link rel="stylesheet" type="text/css" href="/pride-blog/libs/lightGallery/css/lightgallery.min.css">
    <link rel="stylesheet" type="text/css" href="/pride-blog/css/matery.css">
    <link rel="stylesheet" type="text/css" href="/pride-blog/css/my.css">

    <script src="/pride-blog/libs/jquery/jquery.min.js"></script>

<meta name="generator" content="Hexo 5.3.0"><link rel="stylesheet" href="/pride-blog/css/prism-tomorrow.css" type="text/css"><!-- hexo-inject:begin --><!-- hexo-inject:end --></head>




<body>
    <!-- hexo-inject:begin --><!-- hexo-inject:end --><header class="navbar-fixed">
    <nav id="headNav" class="bg-color nav-transparent">
        <div id="navContainer" class="nav-wrapper container">
            <div class="brand-logo">
                <a href="/pride-blog/" class="waves-effect waves-light">
                    
                    <img src="/pride-blog/medias/logo.png" class="logo-img" alt="LOGO">
                    
                    <span class="logo-span">zihao blog</span>
                </a>
            </div>
            

<a href="#" data-target="mobile-nav" class="sidenav-trigger button-collapse"><i class="fas fa-bars"></i></a>
<ul class="right nav-menu">
  
  <li class="hide-on-med-and-down nav-item">
    
    <a href="/pride-blog/" class="waves-effect waves-light">
      
      <i class="fas fa-home" style="zoom: 0.6;"></i>
      
      <span>首页</span>
    </a>
    
  </li>
  
  <li class="hide-on-med-and-down nav-item">
    
    <a href="/pride-blog/categories/CSS/" class="waves-effect waves-light">
      
      <i class="fas fa-bookmark" style="zoom: 0.6;"></i>
      
      <span>分类</span>
    </a>
    
  </li>
  
  <li class="hide-on-med-and-down nav-item">
    
    <a href="/pride-blog/archives" class="waves-effect waves-light">
      
      <i class="fas fa-archive" style="zoom: 0.6;"></i>
      
      <span>归档</span>
    </a>
    
  </li>
  
  <li>
    <a href="#searchModal" class="modal-trigger waves-effect waves-light">
      <i id="searchIcon" class="fas fa-search" title="搜索" style="zoom: 0.85;"></i>
    </a>
  </li>
</ul>


<div id="mobile-nav" class="side-nav sidenav">

    <div class="mobile-head bg-color">
        
        <img src="/pride-blog/medias/logo.png" class="logo-img circle responsive-img">
        
        <div class="logo-name">zihao blog</div>
        <div class="logo-desc">
            
            别做一个Vue api调用师
            
        </div>
    </div>

    

    <ul class="menu-list mobile-menu-list">
        
        <li class="m-nav-item">
	  
		<a href="/pride-blog/" class="waves-effect waves-light">
			
			    <i class="fa-fw fas fa-home"></i>
			
			首页
		</a>
          
        </li>
        
        <li class="m-nav-item">
	  
		<a href="/pride-blog/categories/CSS/" class="waves-effect waves-light">
			
			    <i class="fa-fw fas fa-bookmark"></i>
			
			分类
		</a>
          
        </li>
        
        <li class="m-nav-item">
	  
		<a href="/pride-blog/archives" class="waves-effect waves-light">
			
			    <i class="fa-fw fas fa-archive"></i>
			
			归档
		</a>
          
        </li>
        
        
    </ul>
</div>


        </div>

        
    </nav>

</header>

    



<div class="bg-cover pd-header post-cover" style="background-image: url('/pride-blog/medias/featureimages/22.jpg')">
    <div class="container" style="right: 0px;left: 0px;">
        <div class="row">
            <div class="col s12 m12 l12">
                <div class="brand">
                    <h1 class="description center-align post-title">javaScript-数组常见的一些方法</h1>
                </div>
            </div>
        </div>
    </div>
</div>




<main class="post-container content">

    
    <link rel="stylesheet" href="/pride-blog/libs/tocbot/tocbot.css">
<style>
    #articleContent h1::before,
    #articleContent h2::before,
    #articleContent h3::before,
    #articleContent h4::before,
    #articleContent h5::before,
    #articleContent h6::before {
        display: block;
        content: " ";
        height: 100px;
        margin-top: -100px;
        visibility: hidden;
    }

    #articleContent :focus {
        outline: none;
    }

    .toc-fixed {
        position: fixed;
        top: 64px;
    }

    .toc-widget {
        width: 345px;
        padding-left: 20px;
    }

    .toc-widget .toc-title {
        padding: 35px 0 15px 17px;
        font-size: 1.5rem;
        font-weight: bold;
        line-height: 1.5rem;
    }

    .toc-widget ol {
        padding: 0;
        list-style: none;
    }

    #toc-content {
        padding-bottom: 30px;
        overflow: auto;
    }

    #toc-content ol {
        padding-left: 10px;
    }

    #toc-content ol li {
        padding-left: 10px;
    }

    #toc-content .toc-link:hover {
        color: #42b983;
        font-weight: 700;
        text-decoration: underline;
    }

    #toc-content .toc-link::before {
        background-color: transparent;
        max-height: 25px;

        position: absolute;
        right: 23.5vw;
        display: block;
    }

    #toc-content .is-active-link {
        color: #42b983;
    }

    #floating-toc-btn {
        position: fixed;
        right: 15px;
        bottom: 76px;
        padding-top: 15px;
        margin-bottom: 0;
        z-index: 998;
    }

    #floating-toc-btn .btn-floating {
        width: 48px;
        height: 48px;
    }

    #floating-toc-btn .btn-floating i {
        line-height: 48px;
        font-size: 1.4rem;
    }
</style>
<div class="row">
    <div id="main-content" class="col s12 m12 l9">
        <!-- 文章内容详情 -->
<div id="artDetail">
    <div class="card">
        <div class="card-content article-info">
            <div class="row tag-cate">
                <div class="col s7">
                    
                    <div class="article-tag">
                        
                            <a href="/pride-blog/tags/javaScript/">
                                <span class="chip bg-color">javaScript</span>
                            </a>
                        
                    </div>
                    
                </div>
                <div class="col s5 right-align">
                    
                    <div class="post-cate">
                        <i class="fas fa-bookmark fa-fw icon-category"></i>
                        
                            <a href="/pride-blog/categories/javaScript/" class="post-category">
                                javaScript
                            </a>
                        
                    </div>
                    
                </div>
            </div>

            <div class="post-info">
                
                <div class="post-date info-break-policy">
                    <i class="far fa-calendar-minus fa-fw"></i>发布日期:&nbsp;&nbsp;
                    2021-03-21
                </div>
                

                

                

                

                
            </div>
        </div>
        <hr class="clearfix">

        

        

        <div class="card-content article-card-content">
            <div id="articleContent">
                <h3 id="本文介绍了一些常见的数组的方法"><a href="#本文介绍了一些常见的数组的方法" class="headerlink" title="本文介绍了一些常见的数组的方法"></a>本文介绍了一些常见的数组的方法</h3><h4 id="1-数组的定义和初始化"><a href="#1-数组的定义和初始化" class="headerlink" title="1. 数组的定义和初始化"></a>1. 数组的定义和初始化</h4><p>1.1 数组的创建</p>
<pre class=" language-javaScript"><code class="language-javaScript">var arr = [];
var arr = new Array(1,2,3); // [1,2,3];
// ES6写法
var arr = Array.of(1,2,3);
// Array.of方法主要就是用来弥补Array()的不足;
Array(); // []
Array(3); // [, , ,]
Array(1,2,3); // [1,2,3]
Array.of(3); // [3]

// Array.from方法可以将类数组转化成真正的数组;
let arrayLike = &#123;
    '0': 'a',
    '1': 'b',
    '2': 'c',
    length: 3
&#125;;
// ES5的写法
var arr1 = [].slice.call(arrayLike); // ['a', 'b', 'c']

// ES6的写法
let arr2 = Array.from(arrayLike); // ['a', 'b', 'c']

Array.from('hello')
// ['h', 'e', 'l', 'l', 'o']</code></pre>
<h4 id="2-数组的增加和删除"><a href="#2-数组的增加和删除" class="headerlink" title="2. 数组的增加和删除"></a>2. 数组的增加和删除</h4><h5 id="2-1-Array-push-和-Array-pop"><a href="#2-1-Array-push-和-Array-pop" class="headerlink" title="2.1 Array.push() 和 Array.pop()"></a>2.1 Array.push() 和 Array.pop()</h5><p>push():从数组的尾部添加<br>pop():从数组的尾部删除</p>
<h5 id="2-2-Array-unshift-和-Array-shift"><a href="#2-2-Array-unshift-和-Array-shift" class="headerlink" title="2.2 Array.unshift() 和 Array.shift()"></a>2.2 Array.unshift() 和 Array.shift()</h5><p>unshift():从数组的头部添加<br>shift():从数组的头部删除</p>
<h5 id="2-2-Array-splice"><a href="#2-2-Array-splice" class="headerlink" title="2.2 Array.splice()"></a>2.2 Array.splice()</h5><p>Array.splice(index,howmany,item1,……itemx)</p>
<table>
<thead>
<tr>
<th>参数</th>
<th>描述</th>
</tr>
</thead>
<tbody><tr>
<td>index</td>
<td>必须;整数,规定添加 / 删除项目的位置</td>
</tr>
<tr>
<td>howmany</td>
<td>必须;要删除的项目的数量;如果设置为 0,则不删除</td>
</tr>
<tr>
<td>item1,……itemx</td>
<td>可选;向数组添加的新项目</td>
</tr>
</tbody></table>
<pre class=" language-javaScript"><code class="language-javaScript">var arr = new Array(6)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
arr[3] = "James"
arr[4] = "Adrew"
arr[5] = "Martin"

arr.splice(2,3,"William") // George,John,William,Martin</code></pre>
<h5 id="2-3-Array-String-slice"><a href="#2-3-Array-String-slice" class="headerlink" title="2.3 Array / String .slice()"></a>2.3 Array / String .slice()</h5><p>Array.slice(start,end) :截取从起始位置-结束的位置的选项;返回一个新的数组 / 字符串,不改变原有的数组 / 字符串</p>
<pre class=" language-javaScript"><code class="language-javaScript">var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
document.write(arr.slice(1) + "<br />") // John,Thomas
document.write(arr) // George,John,Thomas</code></pre>
<h4 id="3-数组的排序"><a href="#3-数组的排序" class="headerlink" title="3. 数组的排序"></a>3. 数组的排序</h4><h5 id="3-1-Array-sort"><a href="#3-1-Array-sort" class="headerlink" title="3.1 Array.sort()"></a>3.1 Array.sort()</h5><p>Array.sort()接收一个回调函数做参数;<br>**注意:**数组在原数组上进行排序,不生成副本;</p>
<pre class=" language-javaScript"><code class="language-javaScript">var arr = [1,4,6,5,10,8,20,7];
arr.sort(function(a,b) &#123;
    return a - b;
&#125;);
console.log(arr); // [1,4,5,6,7,8,10,20]

arr.sort(function(a,b) &#123;
    return b - a;
&#125;);
console.log(arr); // [20,10,8,7,6,5,4,1]</code></pre>
<h5 id="3-2-Array-reverse"><a href="#3-2-Array-reverse" class="headerlink" title="3.2 Array.reverse()"></a>3.2 Array.reverse()</h5><p>Array.reverse(): 反转数组中的元素的顺序;<br>**注意:**该方法会改变原数组上,不生成副本;</p>
<pre class=" language-javaScript"><code class="language-javaScript">var arr = [1,4,6,5,10,8,20,7];
arr.reverse();
console.log(arr); // [7,20,8,10,5,6,4,1]
</code></pre>
<h4 id="4-数组的遍历和筛选"><a href="#4-数组的遍历和筛选" class="headerlink" title="4. 数组的遍历和筛选"></a>4. 数组的遍历和筛选</h4><h5 id="4-1-Array-every"><a href="#4-1-Array-every" class="headerlink" title="4.1 Array.every()"></a>4.1 Array.every()</h5><p>Array.every()接收一个回调函数做参数,用于检测数组中所有的元素是否符合指定条件;<br><strong>返回:</strong><br>如果数组中有一个元素不满足,则返回 false,并且剩余的元素不会再进行检测;<br>如果所有的元素都满足,则返回 true;</p>
<p><strong>注意:</strong><br>1.every()不会对空数组进行检测;<br>2.every()不会改变原数组;</p>
<pre class=" language-javaScript"><code class="language-javaScript">let number = [1,2,3,4,5];
let everyResult = number.every((item, index, array)=>&#123;
    return item > 2
&#125;)
console.log(everyResult)// false</code></pre>
<h5 id="4-2-Array-some"><a href="#4-2-Array-some" class="headerlink" title="4.2 Array.some()"></a>4.2 Array.some()</h5><p>Array.some()接收一个回调函数做参数,用于检测数组中的元素是否符合指定条件;<br><strong>返回:</strong><br>如果数组中有一个元素满足条件,则返回 true,并且剩余的元素不会再进行检测;<br>如果没有满足条件的元素,则返回 false;</p>
<p><strong>注意:</strong><br>1.some()不会对空数组进行检测;<br>2.some()不会改变原数组;</p>
<pre class=" language-javaScript"><code class="language-javaScript">let number = [1,2,3,4,5];
let someResult = number.some((item, index, array)=>&#123;
    return item > 2
&#125;)
console.log(someResult)// true</code></pre>
<h5 id="4-3-Array-filter"><a href="#4-3-Array-filter" class="headerlink" title="4.3 Array.filter()"></a>4.3 Array.filter()</h5><p>Array.filter()接收一个回调函数做参数,用于检测数组中的元素是否符合指定条件;<br><strong>返回:</strong><br>返回一个新的数组,新数组中的元素是符合指定条件的所有的元素;</p>
<p><strong>注意:</strong><br>1.filter()不会对空数组进行检测;<br>2.filter()不会改变原数组;</p>
<pre class=" language-javaScript"><code class="language-javaScript">let number = [1,2,3,4,5];
let filterResult = number.filter((item, index, array)=>&#123;
    return item > 2
&#125;)
console.log(filterResult)// [3, 4, 5]</code></pre>
<h5 id="4-4-Array-map"><a href="#4-4-Array-map" class="headerlink" title="4.4 Array.map()"></a>4.4 Array.map()</h5><p>Array.map()接收一个回调函数做参数,一般用于想对数组中每一项某个属性做一定的处理;<br><strong>返回:</strong><br>返回一个新的数组,新数组中的每一项是在原数组中的对应项上进行处理的结果;</p>
<p><strong>注意:</strong><br>1.map()不会对空数组进行检测;<br>2.map()不会改变原数组;</p>
<pre class=" language-javaScript"><code class="language-javaScript">let number = [1,2,3,4,5];
let mapResult = number.map((item, index, array)=>&#123;
    return item * 2
&#125;)
console.log(mapResult)// [2, 4, 6, 8, 10]</code></pre>
<h5 id="4-5-Array-forEach"><a href="#4-5-Array-forEach" class="headerlink" title="4.5 Array.forEach()"></a>4.5 Array.forEach()</h5><p>Array.forEach()遍历,在此不过多赘述;</p>
<h4 id="5-数组的查值"><a href="#5-数组的查值" class="headerlink" title="5. 数组的查值"></a>5. 数组的查值</h4><h5 id="5-1-Array-find"><a href="#5-1-Array-find" class="headerlink" title="5.1 Array.find()"></a>5.1 Array.find()</h5><p>Array.find()接收一个回调函数做参数,查找第一个符合条件的成员;</p>
<pre class=" language-javaScript"><code class="language-javaScript">[1, 4, -5, 10].find((n) => n < 0) // -5</code></pre>
<h5 id="5-1-Array-includs"><a href="#5-1-Array-includs" class="headerlink" title="5.1 Array.includs()"></a>5.1 Array.includs()</h5><p>Array.includs()接收两个参数:要查找的项和表示查找的起点位置的索引;返回一个布尔值;</p>
<pre class=" language-javaScript"><code class="language-javaScript">[1, 2, 3].includes(2)     // true
[1, 2, 3].includes(4)     // false
[1, 2, NaN].includes(NaN) // true
[1, 2, 3].includes(3, 3);  // false
[1, 2, 3].includes(3, -1); // true</code></pre>
<h4 id="6-数组的位置"><a href="#6-数组的位置" class="headerlink" title="6. 数组的位置"></a>6. 数组的位置</h4><h5 id="6-1-Array-indexOf"><a href="#6-1-Array-indexOf" class="headerlink" title="6.1 Array.indexOf()"></a>6.1 Array.indexOf()</h5><p>Array.indexOf()接收两个参数:要查找的项和表示查找起点位置的索引,找到符合条件的项就返回他的索引,找不到就返回-1;</p>
<pre class=" language-javaScript"><code class="language-javaScript">let arr = [1,2,3,2];
arr.indexOf(2)// 1
arr.lastIndexOf(2)// 3
arr.indexOf(4)// -1</code></pre>
<h5 id="6-2-Array-findIndex"><a href="#6-2-Array-findIndex" class="headerlink" title="6.2 Array.findIndex()"></a>6.2 Array.findIndex()</h5><p>Array.findIndex()接收一个回调函数做参数,返回查找第一个符合条件的成员的索引位置,找不到就返回-1;</p>
<pre class=" language-javaScript"><code class="language-javaScript">[1, 5, 10, 15].findIndex(function(value, index, arr) &#123;//依次当前的值、当前的位置和原数组
  return value > 9;
&#125;) // 2</code></pre>
<h4 id="7-多维数组转一维数组"><a href="#7-多维数组转一维数组" class="headerlink" title="7. 多维数组转一维数组"></a>7. 多维数组转一维数组</h4><h5 id="7-1-Array-flat"><a href="#7-1-Array-flat" class="headerlink" title="7.1 Array.flat()"></a>7.1 Array.flat()</h5><p>Array.flat()用于将嵌套的数组”拉平”,变成一维数组;返回一个新数组,接收一个参数,表示想要拉平的层数,infinity 表示无穷大;无论多少层,都”拉平”成 1 层;</p>
<pre class=" language-javaScript"><code class="language-javaScript">[1, 2, [3, [4, 5]]].flat() // [1, 2, 3, [4, 5]]
[1, 2, [3, [4, 5]]].flat(2) // [1, 2, 3, 4, 5]
[1, [2, [3]]].flat(Infinity) // [1, 2, 3] 不管多少曾，都要转成一维数组，可以 用Infinity参数。
</code></pre>
<h4 id="8-数组的合并"><a href="#8-数组的合并" class="headerlink" title="8. 数组的合并"></a>8. 数组的合并</h4><h5 id="8-1-Array-concat"><a href="#8-1-Array-concat" class="headerlink" title="8.1 Array.concat()"></a>8.1 Array.concat()</h5><p>Array.concat()用于数组的合并,返回一个新的数组,并将接收到的参数都合并到这个新的数组中;</p>
<pre class=" language-javaScript"><code class="language-javaScript">let colors1 = ['red','yellow', 'blue'];
let colors2 = colors1.concat('white', ['black', 'green']);
console.log(colors1)//["red", "yellow", "blue"]
console.log(colors2)//["red", "yellow", "blue", "white", "black", "green"]
</code></pre>
<h4 id="9-数组转其他格式"><a href="#9-数组转其他格式" class="headerlink" title="9. 数组转其他格式"></a>9. 数组转其他格式</h4><h5 id="8-1-Array-toLocalString-Array-toString-Array-valueOf"><a href="#8-1-Array-toLocalString-Array-toString-Array-valueOf" class="headerlink" title="8.1 Array.toLocalString() / Array.toString() / Array.valueOf()"></a>8.1 Array.toLocalString() / Array.toString() / Array.valueOf()</h5><p>Array.toString()方法会返回由数组中每个值的字符串拼接而成的一个以逗号分隔的字符串，而调用 valueOf()返回的还是数组</p>
<pre class=" language-javaScript"><code class="language-javaScript">let colors = ['red','yellow', 'blue'];

colors.toString() // red,blue,green
colors.valueOf() //['red','yellow', 'blue']
colors.toLocaleString() //['red','yellow', 'blue']

console.log(colors.toString()) // red,blue,green
alert(colors.valueOf()) // red,blue,green
console.log(colors.toLocaleString()) // red,blue,green
console.log(colors.join(',')) // red,blue,green
</code></pre>

                
            </div>
            <hr/>

            



            <div class="tag_share" style="display: block;">
                <div class="post-meta__tag-list" style="display: inline-block;">
                    
                        <div class="article-tag">
                            
                                <a href="/pride-blog/tags/javaScript/">
                                    <span class="chip bg-color">javaScript</span>
                                </a>
                            
                        </div>
                    
                </div>
                <div class="post_share" style="zoom: 80%; width: fit-content; display: inline-block; float: right; margin: -0.15rem 0;">
                    <link rel="stylesheet" type="text/css" href="/pride-blog/libs/share/css/share.min.css">
<div id="article-share">

    

    

</div>

                </div>
            </div>
            
        </div>
    </div>

    

    

    

    

    

    

    

    

    

<article id="prenext-posts" class="prev-next articles">
    <div class="row article-row">
        
        <div class="article col s12 m6" data-aos="fade-up">
            <div class="article-badge left-badge text-color">
                <i class="fas fa-chevron-left"></i>&nbsp;上一篇</div>
            <div class="card">
                <a href="/pride-blog/2021/032149956.html">
                    <div class="card-image">
                        
                        
                        <img src="/pride-blog/medias/featureimages/21.jpg" class="responsive-img" alt="javaScript-this和call、apply、bind">
                        
                        <span class="card-title">javaScript-this和call、apply、bind</span>
                    </div>
                </a>
                <div class="card-content article-content">
                    <div class="summary block-with-text">
                        
                            
                        
                    </div>
                    <div class="publish-info">
                        <span class="publish-date">
                            <i class="far fa-clock fa-fw icon-date"></i>2021-03-21
                        </span>
                        <span class="publish-author">
                            
                            <i class="fas fa-bookmark fa-fw icon-category"></i>
                            
                            <a href="/pride-blog/categories/javaScript/" class="post-category">
                                    javaScript
                                </a>
                            
                            
                        </span>
                    </div>
                </div>
                
                <div class="card-action article-tags">
                    
                    <a href="/pride-blog/tags/javaScript/">
                        <span class="chip bg-color">javaScript</span>
                    </a>
                    
                </div>
                
            </div>
        </div>
        
        
        <div class="article col s12 m6" data-aos="fade-up">
            <div class="article-badge right-badge text-color">
                下一篇&nbsp;<i class="fas fa-chevron-right"></i>
            </div>
            <div class="card">
                <a href="/pride-blog/2021/03171227.html">
                    <div class="card-image">
                        
                        
                        <img src="/pride-blog/medias/featureimages/16.jpg" class="responsive-img" alt="javaScript-继承">
                        
                        <span class="card-title">javaScript-继承</span>
                    </div>
                </a>
                <div class="card-content article-content">
                    <div class="summary block-with-text">
                        
                            
                        
                    </div>
                    <div class="publish-info">
                            <span class="publish-date">
                                <i class="far fa-clock fa-fw icon-date"></i>2021-03-17
                            </span>
                        <span class="publish-author">
                            
                            <i class="fas fa-bookmark fa-fw icon-category"></i>
                            
                            <a href="/pride-blog/categories/javaScript/" class="post-category">
                                    javaScript
                                </a>
                            
                            
                        </span>
                    </div>
                </div>
                
                <div class="card-action article-tags">
                    
                    <a href="/pride-blog/tags/javaScript/">
                        <span class="chip bg-color">javaScript</span>
                    </a>
                    
                </div>
                
            </div>
        </div>
        
    </div>
</article>

</div>



<!-- 代码块功能依赖 -->
<script type="text/javascript" src="/pride-blog/libs/codeBlock/codeBlockFuction.js"></script>

<!-- 代码语言 -->

<script type="text/javascript" src="/pride-blog/libs/codeBlock/codeLang.js"></script>


<!-- 代码块复制 -->

<script type="text/javascript" src="/pride-blog/libs/codeBlock/codeCopy.js"></script>


<!-- 代码块收缩 -->

<script type="text/javascript" src="/pride-blog/libs/codeBlock/codeShrink.js"></script>


    </div>
    <div id="toc-aside" class="expanded col l3 hide-on-med-and-down">
        <div class="toc-widget card" style="background-color: white;">
            <div class="toc-title"><i class="far fa-list-alt"></i>&nbsp;&nbsp;目录</div>
            <div id="toc-content"></div>
        </div>
    </div>
</div>

<!-- TOC 悬浮按钮. -->

<div id="floating-toc-btn" class="hide-on-med-and-down">
    <a class="btn-floating btn-large bg-color">
        <i class="fas fa-list-ul"></i>
    </a>
</div>


<script src="/pride-blog/libs/tocbot/tocbot.min.js"></script>
<script>
    $(function () {
        tocbot.init({
            tocSelector: '#toc-content',
            contentSelector: '#articleContent',
            headingsOffset: -($(window).height() * 0.4 - 45),
            collapseDepth: Number('0'),
            headingSelector: 'h2, h3, h4'
        });

        // modify the toc link href to support Chinese.
        let i = 0;
        let tocHeading = 'toc-heading-';
        $('#toc-content a').each(function () {
            $(this).attr('href', '#' + tocHeading + (++i));
        });

        // modify the heading title id to support Chinese.
        i = 0;
        $('#articleContent').children('h2, h3, h4').each(function () {
            $(this).attr('id', tocHeading + (++i));
        });

        // Set scroll toc fixed.
        let tocHeight = parseInt($(window).height() * 0.4 - 64);
        let $tocWidget = $('.toc-widget');
        $(window).scroll(function () {
            let scroll = $(window).scrollTop();
            /* add post toc fixed. */
            if (scroll > tocHeight) {
                $tocWidget.addClass('toc-fixed');
            } else {
                $tocWidget.removeClass('toc-fixed');
            }
        });

        
        /* 修复文章卡片 div 的宽度. */
        let fixPostCardWidth = function (srcId, targetId) {
            let srcDiv = $('#' + srcId);
            if (srcDiv.length === 0) {
                return;
            }

            let w = srcDiv.width();
            if (w >= 450) {
                w = w + 21;
            } else if (w >= 350 && w < 450) {
                w = w + 18;
            } else if (w >= 300 && w < 350) {
                w = w + 16;
            } else {
                w = w + 14;
            }
            $('#' + targetId).width(w);
        };

        // 切换TOC目录展开收缩的相关操作.
        const expandedClass = 'expanded';
        let $tocAside = $('#toc-aside');
        let $mainContent = $('#main-content');
        $('#floating-toc-btn .btn-floating').click(function () {
            if ($tocAside.hasClass(expandedClass)) {
                $tocAside.removeClass(expandedClass).hide();
                $mainContent.removeClass('l9');
            } else {
                $tocAside.addClass(expandedClass).show();
                $mainContent.addClass('l9');
            }
            fixPostCardWidth('artDetail', 'prenext-posts');
        });
        
    });
</script>

    

</main>




    <footer class="page-footer bg-color">
    

    <div class="container row center-align"
         style="margin-bottom: 0px !important;">
        <div class="col s12 m8 l8 copy-right">
            Copyright&nbsp;&copy;
            
                <span id="year">2021-2023</span>
            
            <span id="year">2021</span>
            <a href="/pride-blog/about" target="_blank">zihao xiong</a>
            |&nbsp;Powered by&nbsp;<a href="https://hexo.io/" target="_blank">Hexo</a>
            |&nbsp;Theme&nbsp;<a href="https://github.com/blinkfox/hexo-theme-matery" target="_blank">Matery</a>
            <br>
            
            
            
            
            
            <br>

            <!-- 运行天数提醒. -->
            
            <br>
            
        </div>
        <div class="col s12 m4 l4 social-link ">














</div>
    </div>
</footer>

<div class="progress-bar"></div>


    <!-- 搜索遮罩框 -->
<div id="searchModal" class="modal">
    <div class="modal-content">
        <div class="search-header">
            <span class="title"><i class="fas fa-search"></i>&nbsp;&nbsp;搜索</span>
            <input type="search" id="searchInput" name="s" placeholder="请输入搜索的关键字"
                   class="search-input">
        </div>
        <div id="searchResult"></div>
    </div>
</div>

<script type="text/javascript">
$(function () {
    var searchFunc = function (path, search_id, content_id) {
        'use strict';
        $.ajax({
            url: path,
            dataType: "xml",
            success: function (xmlResponse) {
                // get the contents from search data
                var datas = $("entry", xmlResponse).map(function () {
                    return {
                        title: $("title", this).text(),
                        content: $("content", this).text(),
                        url: $("url", this).text()
                    };
                }).get();
                var $input = document.getElementById(search_id);
                var $resultContent = document.getElementById(content_id);
                $input.addEventListener('input', function () {
                    var str = '<ul class=\"search-result-list\">';
                    var keywords = this.value.trim().toLowerCase().split(/[\s\-]+/);
                    $resultContent.innerHTML = "";
                    if (this.value.trim().length <= 0) {
                        return;
                    }
                    // perform local searching
                    datas.forEach(function (data) {
                        var isMatch = true;
                        var data_title = data.title.trim().toLowerCase();
                        var data_content = data.content.trim().replace(/<[^>]+>/g, "").toLowerCase();
                        var data_url = data.url;
                        data_url = data_url.indexOf('/') === 0 ? data.url : '/' + data_url;
                        var index_title = -1;
                        var index_content = -1;
                        var first_occur = -1;
                        // only match artiles with not empty titles and contents
                        if (data_title !== '' && data_content !== '') {
                            keywords.forEach(function (keyword, i) {
                                index_title = data_title.indexOf(keyword);
                                index_content = data_content.indexOf(keyword);
                                if (index_title < 0 && index_content < 0) {
                                    isMatch = false;
                                } else {
                                    if (index_content < 0) {
                                        index_content = 0;
                                    }
                                    if (i === 0) {
                                        first_occur = index_content;
                                    }
                                }
                            });
                        }
                        // show search results
                        if (isMatch) {
                            str += "<li><a href='" + data_url + "' class='search-result-title'>" + data_title + "</a>";
                            var content = data.content.trim().replace(/<[^>]+>/g, "");
                            if (first_occur >= 0) {
                                // cut out 100 characters
                                var start = first_occur - 20;
                                var end = first_occur + 80;
                                if (start < 0) {
                                    start = 0;
                                }
                                if (start === 0) {
                                    end = 100;
                                }
                                if (end > content.length) {
                                    end = content.length;
                                }
                                var match_content = content.substr(start, end);
                                // highlight all keywords
                                keywords.forEach(function (keyword) {
                                    var regS = new RegExp(keyword, "gi");
                                    match_content = match_content.replace(regS, "<em class=\"search-keyword\">" + keyword + "</em>");
                                });

                                str += "<p class=\"search-result\">" + match_content + "...</p>"
                            }
                            str += "</li>";
                        }
                    });
                    str += "</ul>";
                    $resultContent.innerHTML = str;
                });
            }
        });
    };

    searchFunc('/pride-blog/search.xml', 'searchInput', 'searchResult');
});
</script>

    <!-- 回到顶部按钮 -->
<div id="backTop" class="top-scroll">
    <a class="btn-floating btn-large waves-effect waves-light" href="#!">
        <i class="fas fa-arrow-up"></i>
    </a>
</div>


    <script src="/pride-blog/libs/materialize/materialize.min.js"></script>
    <script src="/pride-blog/libs/masonry/masonry.pkgd.min.js"></script>
    <script src="/pride-blog/libs/aos/aos.js"></script>
    <script src="/pride-blog/libs/scrollprogress/scrollProgress.min.js"></script>
    <script src="/pride-blog/libs/lightGallery/js/lightgallery-all.min.js"></script>
    <script src="/pride-blog/js/matery.js"></script>

    <!-- Baidu Analytics -->

    <!-- Baidu Push -->

<script>
    (function () {
        var bp = document.createElement('script');
        var curProtocol = window.location.protocol.split(':')[0];
        if (curProtocol === 'https') {
            bp.src = 'https://zz.bdstatic.com/linksubmit/push.js';
        } else {
            bp.src = 'http://push.zhanzhang.baidu.com/push.js';
        }
        var s = document.getElementsByTagName("script")[0];
        s.parentNode.insertBefore(bp, s);
    })();
</script>

    
    <script src="/pride-blog/libs/others/clicklove.js" async="async"></script>
    
    

    

    

    <!--腾讯兔小巢-->
    
    
    <script type="text/javascript" color="0,0,255"
        pointColor="0,0,255" opacity='0.7'
        zIndex="-1" count="99"
        src="/pride-blog/libs/background/canvas-nest.js"></script>
    

    
    
    <script type="text/javascript" size="150" alpha='0.6'
        zIndex="-1" src="/pride-blog/libs/background/ribbon-refresh.min.js" async="async"></script>
    

    
    <script type="text/javascript" src="/pride-blog/libs/background/ribbon-dynamic.js" async="async"></script>
    

    
    <script src="/pride-blog/libs/instantpage/instantpage.js" type="module"></script><!-- hexo-inject:begin --><!-- hexo-inject:end -->
    

</body>
<script src="./../source/js/cursor.js"></script>

</html>
